Goa's ANHC Ayurvedic Natural Health Centre conducts regular yoga courses throughout the year. Aranya Retreat in Goa is also a good option if you are looking for a more personal experience.
Kerala is full of wellness centres offering massage, yoga, and spas. Most of them are quite good. You can also choose to stay in a lodge/homestay that specializes in the same. Yogalife Homestay in Ernakulum is a sensible option. about 5 years ago